Jūra, ae (also Jūres, ĭum, m., Plin. 3, 4, 5, § 31; 16, 39, 76, § 197), m., a chain of mountains extending from the Rhine to the Rhone, Caes. B. G. 1, 2. Hence, Jūren-sis, e, adj., of Mount Jura, Sid. Ep. 4, 25.